/* Donate Button Styles */
        .donate-btn {
            position: fixed;
            bottom: 20px;
            right: 20px;
            padding: 16px 24px;
            font-size: 16px;
            font-weight: bold;
            color: white;
            background: linear-gradient(45deg, #FF512F, #DD2476);
            border: none;
            border-radius: 50px;
            cursor: pointer;
            box-shadow: 0 4px 20px rgba(221, 36, 118, 0.35);
            z-index: 1000;
            overflow: hidden;
            transition: all 0.3s ease;
            transform: translateY(0);
            animation: pulse 2s infinite;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        .donate-btn:hover {
            transform: translateY(-5px) scale(1.05);
            box-shadow: 0 8px 25px rgba(221, 36, 118, 0.5);
            animation: none;
        }
        
        .donate-btn:active {
            transform: translateY(2px) scale(0.98);
        }
        
        .donate-btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
            transition: 0.5s;
        }
        
        .donate-btn:hover::before {
            left: 100%;
        }
        
        @keyframes pulse {
            0% {
                box-shadow: 0 0 0 0 rgba(221, 36, 118, 0.7);
            }
            70% {
                box-shadow: 0 0 0 15px rgba(221, 36, 118, 0);
            }
            100% {
                box-shadow: 0 0 0 0 rgba(221, 36, 118, 0);
            }
        }
        
        /* Popup Overlay */
        .popup-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.7);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 2000;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
            padding: 15px;
        }
        
        .popup-overlay.active {
            opacity: 1;
            visibility: visible;
        }
        
        /* Donation Form */
        .donation-form {
            background: white;
            width: 100%;
            max-width: 500px;
            max-height: 90vh;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
            transform: scale(0.9);
            opacity: 0;
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
        }
        
        .popup-overlay.active .donation-form {
            transform: scale(1);
            opacity: 1;
        }
        
        .form-header {
            background: linear-gradient(45deg, #FF512F, #DD2476);
            color: white;
            padding: 20px;
            text-align: center;
            position: relative;
            flex-shrink: 0;
        }
        
        .close-btn {
            position: absolute;
            top: 15px;
            right: 15px;
            background: rgba(255, 255, 255, 0.2);
            width: 30px;
            height: 30px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        
        .close-btn:hover {
            background: rgba(255, 255, 255, 0.3);
            transform: rotate(90deg);
        }
        
        .form-body {
            padding: 25px;
            overflow-y: auto;
            flex-grow: 1;
        }
        
        .form-group {
            margin-bottom: 20px;
            text-align: left;
        }
        
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: #2c3e50;
            font-size: 16px;
        }
        
        .form-group input, .form-group select {
            width: 100%;
            padding: 16px;
            border: 2px solid #e1e5ec;
            border-radius: 8px;
            font-size: 16px;
            transition: all 0.3s ease;
            -webkit-appearance: none;
        }
        
        .form-group input:focus, .form-group select:focus {
            border-color: #DD2476;
            outline: none;
            box-shadow: 0 0 0 3px rgba(221, 36, 118, 0.2);
        }
        
        .amount-options {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            margin-top: 10px;
        }
        
        .amount-option {
            flex: 1;
            min-width: 70px;
            text-align: center;
            padding: 14px 10px;
            background: #f8f9fa;
            border: 2px solid #e1e5ec;
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s ease;
            font-weight: 600;
            font-size: 16px;
        }
        
        .amount-option:hover {
            background: #e9ecef;
        }
        
        .amount-option.selected {
            background: #DD2476;
            color: white;
            border-color: #DD2476;
        }
        
        .submit-btn {
            width: 100%;
            padding: 18px;
            background: linear-gradient(45deg, #FF512F, #DD2476);
            border: none;
            border-radius: 8px;
            color: white;
            font-size: 18px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s ease;
            margin-top: 10px;
        }
        
        .submit-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(221, 36, 118, 0.4);
        }
        
        .submit-btn:active {
            transform: translateY(0);
        }
        
        /* QR Code Section */
        .qr-section {
            text-align: center;
            padding: 20px;
            display: none;
            flex-direction: column;
            align-items: center;
            overflow-y: auto;
        }
        
        .qr-container {
            margin: 15px auto;
            padding: 15px;
            background: white;
            border-radius: 10px;
            display: inline-block;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            max-width: 100%;
        }
        
        #qrcode {
            margin: 0 auto;
            padding: 10px;
            display: flex;
            justify-content: center;
        }
        
        .qr-note {
            margin-top: 15px;
            color: #6c757d;
            font-size: 16px;
            text-align: center;
            line-height: 1.5;
        }
        
        .payment-success {
            text-align: center;
            padding: 30px 20px;
            display: none;
            flex-direction: column;
            align-items: center;
        }
        
        .success-icon {
            font-size: 60px;
            color: #28a745;
            margin-bottom: 15px;
        }
        
        /* Responsive Design for Mobile */
        @media (max-width: 600px) {
            .content {
                padding: 20px;
                margin: 10px;
            }
            
            h1 {
                font-size: 1.8rem;
            }
            
            p {
                font-size: 1rem;
            }
            
            .donate-btn {
                bottom: 50;
                right: 15px;
                padding: 14px 20px;
                font-size: 16px;
            }
            
            .form-header {
                padding: 15px;
            }
            
            .form-header h2 {
                font-size: 1.4rem;
                padding-right: 30px;
            }
            
            .form-body {
                padding: 20px;
            }
            
            .form-group label {
                font-size: 16px;
            }
            
            .form-group input, .form-group select {
                padding: 16px;
                font-size: 16px;
            }
            
            .amount-options {
                gap: 8px;
            }
            
            .amount-option {
                min-width: 60px;
                padding: 12px 8px;
                font-size: 15px;
            }
            
            .qr-container {
                padding: 10px;
            }
            
            #qrcode {
                transform: scale(0.9);
            }
        }
        
        @media (max-width: 400px) {
            .donate-btn {
                bottom: 50;
                right: 8px;
                padding: 12px 16px;
                font-size: 14px;
            }
            
            .form-body {
                padding: 15px;
            }
            
            .amount-options {
                flex-direction: column;
            }
            
            .amount-option {
                width: 100%;
            }
            
            .submit-btn {
                padding: 16px;
                font-size: 16px;
            }
        }
        
        /* Custom Scrollbar for Form Body */
        .form-body::-webkit-scrollbar {
            width: 6px;
        }
        
        .form-body::-webkit-scrollbar-track {
            background: #f1f1f1;
            border-radius: 10px;
        }
        
        .form-body::-webkit-scrollbar-thumb {
            background: #DD2476;
            border-radius: 10px;
        }
        
        .form-body::-webkit-scrollbar-thumb:hover {
            background: #FF512F;
        }